cc: Add SetChildrenNeedBeginFrames() & SendBeginFramesToChildren()

cc/trees/single_thread_proxy.cc

Index: cc/trees/single_thread_proxy.cc
diff --git a/cc/trees/single_thread_proxy.cc b/cc/trees/single_thread_proxy.cc
index 91771be084d7caeabbacdf58b84aca930be43c14..5a40d7e5039dc38c3e92b2a7c1ed0257391b9824 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -633,6 +633,12 @@ bool SingleThreadProxy::MainFrameWillHappenForTesting() {
   return false;
 }
 
+void SingleThreadProxy::SetChildrenNeedBeginFrames(
+    bool children_need_begin_frames) {
+  scheduler_on_impl_thread_->SetChildrenNeedBeginFrames(
+      children_need_begin_frames);
+}
+
 void SingleThreadProxy::WillBeginImplFrame(const BeginFrameArgs& args) {
   layer_tree_host_impl_->WillBeginImplFrame(args);
 }
@@ -791,4 +797,8 @@ void SingleThreadProxy::DidBeginImplFrameDeadline() {
   layer_tree_host_impl_->ResetCurrentBeginFrameArgsForNextFrame();
 }
 
+void SingleThreadProxy::SendBeginFramesToChildren(const BeginFrameArgs& args) {
+  layer_tree_host_->SendBeginFramesToChildren(args);
+}
+
 }  // namespace cc